CN114678201A - Preparation method of novel high-weather-resistance resin-coated magnetic metal powder - Google Patents

Preparation method of novel high-weather-resistance resin-coated magnetic metal powder Download PDF

Info

Publication number
CN114678201A
CN114678201A CN202210215327.5A CN202210215327A CN114678201A CN 114678201 A CN114678201 A CN 114678201A CN 202210215327 A CN202210215327 A CN 202210215327A CN 114678201 A CN114678201 A CN 114678201A
Authority
CN
China
Prior art keywords
magnetic metal
metal powder
coated magnetic
powder
coated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202210215327.5A
Other languages
Chinese (zh)
Other versions
CN114678201B (en
Inventor
张林博
汪博
张澎
李君哲
宫禹
陈亚争
葛瑾
梁迪飞
邓龙江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
University of Electronic Science and Technology of China
Original Assignee
University of Electronic Science and Technology of China
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by University of Electronic Science and Technology of China filed Critical University of Electronic Science and Technology of China
Priority to CN202210215327.5A priority Critical patent/CN114678201B/en
Publication of CN114678201A publication Critical patent/CN114678201A/en
Application granted granted Critical
Publication of CN114678201B publication Critical patent/CN114678201B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • H01F41/026—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets protecting methods against environmental influences, e.g. oxygen, by surface treatment
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/32—Radiation-absorbing paints
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Hard Magnetic Materials (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention relates to the field of metal pigments for wave-absorbing coatings, in particular to a preparation method of novel high-weather-resistance resin-coated magnetic metal powder. The invention coats the magnetic metal powder by selecting the resin which is a material not used for modifying the magnetic metal powder in the industry, and the weather resistance of the coated magnetic metal powder is enhanced without causing obvious deterioration of the imaginary part of the magnetic conductivity and the imaginary part of the dielectric constant by designing the process conditions. The method has the advantages of simple and mature process, strong operability and lower cost, and is suitable for large-scale production. The coated magnetic metal powder has uniform and compact surface, and compared with the similar coated magnetic metal powder, the electromagnetic parameter change of the coated magnetic metal powder is small, the weather resistance is obviously enhanced, and the salt spray resistance time of the wave-absorbing coating prepared by the coated magnetic metal powder can reach more than 3000 hours.

Description

Preparation method of novel high-weather-resistance resin-coated magnetic metal powder
Technical Field
The invention relates to the field of metal pigments for wave-absorbing coatings, in particular to a preparation method of novel high-weather-resistance resin-coated magnetic metal powder.
Background
Carbonyl iron powder is an important magnetic metal powder, has high saturation magnetization and low coercive force, and is often used as a functional metal pigment of radar wave-absorbing coating. However, the flaky carbonyl iron powder is active in property and is very easy to generate oxidation corrosion, and particularly, the flaky carbonyl iron powder can generate serious corrosion problem when used in humid, salt fog and acidic environments, and the electromagnetic property of the flaky carbonyl iron powder is seriously weakened by the formation of corrosion products, so that the application of the flaky carbonyl iron powder is greatly limited. Therefore, it is very urgent to achieve long-term chemical stability and electrical and magnetic stability by surface modification of flaky carbonyl iron powder.
At present, the coating modification of carbonyl iron powder by a surface treatment technology is an effective method for improving the weather resistance of powder, and inorganic silicon dioxide is generally adopted in the industry to carry out surface coating modification on the carbonyl iron powder. Patent CN100409979C uses inorganic nano silica to coat the surface of carbonyl iron powder, which aims to reduce the imaginary part of magnetic permeability and realize low loss. The carbonyl iron powder coated by the method has a large number of tiny particles on the surface, so that the surface of the powder is loose and porous, corrosive media such as water vapor, oxygen, chloride ions, sodium ions and the like cannot be isolated, and the corrosion protection of the carbonyl iron powder is not facilitated. Patent CN103007845B provides Fe @ SiO prepared by sol-gel method aiming at spherical iron powder 2The thickness of a coating layer formed by the method is not uniform in the core-shell structure, and long-time corrosion protection of carbonyl iron powder is difficult to realize. Patent CN112563010AA silicon dioxide coating layer with the thickness of 10-100nm is formed on the surface of the iron powder, although the functional coating test piece prepared by the method can realize no rusty spot on the surface after a salt spray corrosion experiment for 1500 h and 1000 h, the magnetic permeability imaginary part and the dielectric constant imaginary part of the carbonyl iron powder are obviously deteriorated by adopting the surface treatment of the silicon dioxide, so that the performance of the wave-absorbing coating prepared by the iron powder coated by the silicon dioxide can not meet the actual use requirement.
Disclosure of Invention
Aiming at the problems or the defects, the invention provides a preparation method of high-weather-resistance novel resin-coated magnetic metal powder, and the magnetic metal powder prepared by the method can ensure that the electromagnetic parameters are not obviously reduced and has long-time salt spray resistance.
A preparation method of high weather-resistant novel resin-coated magnetic metal powder comprises the following steps:
step 1, dissolving a surfactant in an ester solvent at room temperature to obtain a mixture.
And 2, dispersing magnetic metal powder in the mixture obtained in the step 1, dripping acrylic acid at 40-60 ℃, stirring uniformly, sequentially adding an organic cross-linking agent and an organic peroxide initiator for a cross-linking reaction, wherein the reaction atmosphere is a nitrogen environment.
And 3, after the crosslinking reaction in the step 2 is finished, cooling to room temperature, washing and filtering the crosslinked product by using an ester solvent, and then washing and filtering by using absolute ethyl alcohol.
And 4, carrying out heat treatment on the product (the magnetic metal powder with the surface coated and modified) obtained in the step 3 at the temperature of 60-100 ℃ to obtain the magnetic metal powder with the uniform and densely coated surface, wherein the solid content of the magnetic metal powder is 85-95%.
Further, the magnetic metal powder is sheet carbonyl iron powder.
Further, the surfactant in the step 1 is one or more of glycine, alanine, p-aminobenzoic acid and hexadecyl trimethyl ammonium bromide, and the concentration of the surfactant is 0.05-2.00 g/mL.
Further, the ester solvents in steps 1 and 3 are one or two of methyl acetate, butyl acetate, ethyl propionate and ethyl butyrate.
Further, the acrylic acid in the step 2 is one or more of methyl acrylate, butyl acrylate, ethyl methacrylate and n-butyl methacrylate; according to the mass percentage, the adding amount of the acrylic acid is 0.5-1.0% of the magnetic metal powder.
Further, the organic cross-linking agent in the step 2 is one or more of gamma-aminopropyl triethoxysilane, gamma-methacryloxypropyl trimethoxysilane, perfluorodecyl trimethoxysilane and perfluorooctyl triethoxysilane; the addition amount of the organic cross-linking agent is 0.1-0.3% of the magnetic metal powder by mass percent.
Further, the organic peroxide initiator in the step 2 is one of cumene hydroperoxide, tert-butyl hydroperoxide, dibenzoyl peroxide, lauroyl peroxide and di-tert-butyl peroxide; the addition amount of the organic peroxide initiator is 0.1-0.3% of the magnetic metal powder in percentage by mass.
Further, the crosslinking reaction time in the step 2 is 0.5-2 hours, and the reaction is carried out in a stirring state.
Further, the heat treatment time in the step 4 is 8-24 hours.
The invention coats the magnetic metal powder by selecting the resin which is a material not used for modifying the magnetic metal powder in the industry, and the weather resistance of the coated magnetic metal powder is enhanced by designing the process conditions, and meanwhile, the magnetic conductivity imaginary part and the dielectric constant imaginary part do not cause obvious deterioration. The method has the advantages of simple and mature process, strong operability and lower cost, and is suitable for large-scale production. The coated magnetic metal powder has uniform and compact surface, the electromagnetic parameter change of the coated magnetic metal powder is smaller, the weather resistance is obviously enhanced compared with the similar coated magnetic metal powder (such as carbonyl iron powder), and the salt spray resistance time of the prepared coated magnetic metal powder for manufacturing the wave-absorbing coating can reach more than 3000 hours.
Drawings
FIG. 1 is an SEM image of a coated flaky carbonyl iron powder of example 1;
FIG. 2 is a Tafel plot of the flaky carbonyl iron powder of example 1 before and after coating;
FIG. 3 is an SEM image of coated flaky carbonyl iron powder of example 2;
FIG. 4 is a Tafel plot before and after coating with the flaky carbonyl iron powder of example 2;
FIG. 5 is an SEM photograph of coated flaky carbonyl iron powder in example 3;
FIG. 6 is a Tafel plot before and after coating with the flaky carbonyl iron powder of example 3;
FIG. 7 is an SEM photograph of coated flaky carbonyl iron powder of example 4;
FIG. 8 is a Tafel plot before and after coating with the flaky carbonyl iron powder of example 4;
FIG. 9 is a schematic flow chart of the present invention.
Detailed Description
The technical solutions of the present invention will be described in further detail below with reference to the embodiments and the drawings, but the present invention is not limited thereto.
Example 1:
step 1, dissolving 2g of glycine and 3g of alanine in a mixed solution of 40ml of butyl acetate and 60ml of ethyl propionate at the same time, and fully and uniformly stirring to obtain a mixed solution A.
And 2, dispersing 50g of flaky carbonyl iron powder in the mixed solution A, heating to 40 ℃, slowly adding 0.25g of methyl acrylate, and then sequentially adding 0.05g of organic cross-linking agent gamma-aminopropyltriethoxysilane, wherein the reaction atmosphere is a nitrogen environment, the stirring speed is 250 revolutions per minute, and the stirring time is 0.5 hour.
And 3, after the crosslinking reaction in the step 2 is finished, cooling to room temperature, washing and filtering the crosslinked product by butyl acetate, and then washing and filtering by absolute ethyl alcohol.
And 4, carrying out heat treatment on the flaky carbonyl iron powder obtained in the step 3 at the temperature of 60 ℃ for 8 hours to obtain flaky carbonyl iron powder with uniform and densely-coated surface. FIG. 1 is an SEM image of an example of a coated flaky carbonyl iron powder, and Table 1 shows the SEM image before coatingThe change of the electromagnetic parameters of the powder after modification can be seen to be very small, fig. 2 is a tafel curve of the powder after coating, and table 2 is the corresponding corrosion parameters in the tafel curve. The open-circuit voltage of the powder coated by the case one is increased to 0.063V, the electrode potential is increased to-0.054V, the corrosion current density is increased by two orders of magnitude, and the polarization impedance is increased to 27119 omega/cm2. The neutral salt spray resistant time of the wave-absorbing coating prepared by the case one coated powder reaches more than 3200 hours.
Table 1: example 1 electromagnetic parameter changes before and after powder coating
Figure 732769DEST_PATH_IMAGE002
Table 2: example 1 Corrosion parameter Change before and after powder coating
Open circuit voltage Potential of electrode Density of corrosion current Polarization resistor
Raw powder -0.653V -0.868V 1.493×10-4 A/cm2 87.1Ω/cm2
Example 1 coated powder 0.063V -0.054V 1.981×10-6 A/cm2 27119Ω/cm2
Example 2:
step 1, simultaneously dissolving 5g of p-aminobenzoic acid and 7.5g of alanine in a mixed solution of 50ml of butyl acetate and 75ml of ethyl butyrate, and fully and uniformly stirring to obtain a mixed solution A.
And 2, dispersing 100g of sheet carbonyl iron powder in the mixed solution A, heating to 50 ℃, slowly adding 0.75g of methyl acrylate, and then sequentially adding 0.1g of organic cross-linking agent perfluorodecyl trimethoxy silane, wherein the reaction atmosphere is a nitrogen environment, the stirring speed is 250 revolutions per minute, and the stirring time is 0.6 hour.
And 3, after the crosslinking reaction in the step 2 is finished, cooling to room temperature, washing and filtering the crosslinked product by butyl acetate, and washing and filtering by absolute ethyl alcohol.
And 4, carrying out heat treatment on the flaky carbonyl iron powder obtained in the step 3 at the temperature of 75 ℃ for 10 hours to obtain flaky carbonyl iron powder with uniform and densely-coated surface. Fig. 3 is an SEM image of the flaky carbonyl iron powder after the second coating, table 3 is the change of the electromagnetic parameters of the powder before and after the coating, fig. 4 is a tafel curve of the powder after the second coating, and table 4 is the corresponding corrosion parameters in the tafel curve. The open-circuit voltage of the powder coated by case two is increased to 0.049V, the electrode potential is increased to-0.045V, the corrosion current density is increased by two orders of magnitude, and the polarization impedance is increased to 36180 omega/cm 2. The neutral salt spray resistant time of the wave-absorbing coating prepared by the case two coating powder reaches more than 3400 hours.
Table 3: example 2 electromagnetic parameter changes before and after powder coating
Figure 915489DEST_PATH_IMAGE004
Table 4: example 2 Corrosion parameters before and after powder coating
Open circuit voltage Potential of electrode Density of corrosion current Polarization resistor
Raw powder -0.653V -0.868V 1.493×10-4 A/cm2 87.1Ω/cm2
Example 2 coated powder 0.049V -0.045V 1.240×10-6 A/cm2 36180Ω/cm2
Example 3:
step 1, dissolving 8g of hexadecyl trimethyl ammonium bromide in a mixed solution of 30ml of butyl propionate and 50ml of ethyl butyrate, and fully and uniformly stirring to obtain a mixed solution A.
And 2, dispersing 80g of sheet carbonyl iron powder in the mixed solution A, heating to 75 ℃, slowly adding 0.8g of n-butyl methacrylate, and then sequentially adding 0.15g of organic cross-linking agent perfluorodecyl trimethoxy silane, wherein the reaction atmosphere is a nitrogen environment, the stirring speed is 250 revolutions per minute, and the stirring time is 0.5 hour.
And 3, after the crosslinking reaction in the step 2 is finished, cooling to room temperature, washing and filtering the crosslinked product by butyl acetate, and washing and filtering by absolute ethyl alcohol.
And 4, carrying out heat treatment on the flaky carbonyl iron powder obtained in the step 3 at the temperature of 80 ℃ for 17 hours to obtain flaky carbonyl iron powder with uniform and densely coated surface. Fig. 5 is an SEM image of the case of the sheet carbonyl iron powder after three coating, table 5 is the change of the electromagnetic parameters of the powder before and after coating, fig. 6 is the tafel curve of the case of the powder after three coating, and table 6 is the corresponding corrosion parameters in the tafel curve. After the three cases are adopted, the open-circuit voltage of the powder is increased to 0.011V, the electrode potential is increased to-0.103V, the corrosion current density is increased by two orders of magnitude, and the polarization impedance is increased to 35164 omega/cm 2. The neutral salt spray resistant time of the wave-absorbing coating prepared by the case one coated powder reaches more than 3500 hours.
Table 5: example 3 variation of electromagnetic parameters before and after powder coating
Figure 695226DEST_PATH_IMAGE006
Table 6: example 3 Corrosion parameter Change before and after powder coating
Open circuit voltage Potential of electrode Density of corrosion current Polarization resistor
Raw powder -0.653V -0.868V 1.493×10-4 A/cm2 87.1Ω/cm2
Example 3 coated powder 0.011V -0.103V 1.220×10-6 A/cm2 35164Ω/cm2
Example 4:
step 1, dissolving 4g of hexadecyl trimethyl ammonium bromide and 8g of p-aminobenzoic acid in 250ml of mixed solution of ethyl butyrate, and fully and uniformly stirring to obtain mixed solution A.
And 2, dispersing 200g of sheet carbonyl iron powder in the mixed solution A, heating to 80 ℃, slowly adding 1.8g of n-butyl methacrylate, and then sequentially adding 0.2g of organic cross-linking agent perfluorodecyl trimethoxy silane and 0.6g of gamma-aminopropyl triethoxysilane, wherein the reaction atmosphere is a nitrogen environment, the stirring speed is 300 revolutions per minute, and the stirring time is 2 hours.
And 3, after the crosslinking reaction in the step 2 is finished, cooling to room temperature, washing and filtering the crosslinked product by butyl acetate, and washing and filtering by absolute ethyl alcohol.
Step 4, the flaky carbonyl iron obtained in the step 3The powder is subjected to heat treatment for 24 hours at the temperature of 80 ℃ to obtain the flaky carbonyl iron powder with uniform and dense coating on the surface. Fig. 7 is an SEM image of the case of the four-coated flaky carbonyl iron powder, table 7 is the change of the electromagnetic parameters of the powder before and after coating, fig. 8 is the tafel curve of the case of the four-coated powder, and table 8 is the corresponding corrosion parameters in the tafel curve. After the case four is adopted, the open-circuit voltage of the powder is increased to 0.059V, the electrode potential is increased to-0.040V, the corrosion current density is increased by two orders of magnitude, and the polarization impedance is increased to 19965 omega/cm 2. The wave-absorbing coating prepared by using the four-case coated powder has the neutral salt spray resistance time of more than 3100 hours.
Table 7: example 4 variation of electromagnetic parameters before and after coating of powder
Figure 277386DEST_PATH_IMAGE008
Table 8: example 4 Corrosion parameter Change before and after powder coating
Open circuit voltage Potential of electrode Density of corrosion current Polarization resistor
Raw powder -0.653V -0.868V 1.493×10-4 A/cm2 87.1Ω/cm2
Example 4 coated powder 0.059V -0.040V 2.118×10-6 A/cm2 19965Ω/cm2
As can be seen by the above examples: the method has the advantages of simple and mature process, strong operability and lower cost, and is suitable for large-scale production. The coated flaky carbonyl iron powder prepared by the embodiment has uniform and compact surface, small change of electromagnetic parameters and obviously enhanced weather resistance, and the salt spray resistance time of the wave-absorbing coating prepared by the embodiment can reach more than 3000 hours. Namely, the modified magnetic metal powder (flaky carbonyl iron powder) has high weather resistance and good magnetic performance, and provides a new excellent scheme for preparing high-performance modified magnetic metal powder (radar wave absorber).

Claims (9)

1. A preparation method of novel high-weather-resistance resin-coated magnetic metal powder is characterized by comprising the following steps:
step 1, dissolving a surfactant in an ester solvent at room temperature to obtain a mixture;
step 2, dispersing magnetic metal powder in the mixture obtained in the step 1, dropwise adding acrylic acid at 40-60 ℃, stirring uniformly, and then sequentially adding an organic cross-linking agent and an organic peroxide initiator for a cross-linking reaction, wherein the reaction atmosphere is a nitrogen environment;
Step 3, after the crosslinking reaction in the step 2 is finished, cooling to room temperature, washing and filtering the crosslinked product by using an ester solvent, and then washing and filtering by using absolute ethyl alcohol;
and 4, carrying out heat treatment on the product obtained in the step 3 at the temperature of 60-100 ℃ to obtain magnetic metal powder with a uniform and densely coated surface, wherein the solid content of the magnetic metal powder is 85-95%.
2. The method for preparing the highly weather-resistant novel resin-coated magnetic metal powder as claimed in claim 1, wherein: the magnetic metal powder is sheet carbonyl iron powder.
3. The method for preparing the highly weather-resistant novel resin-coated magnetic metal powder as claimed in claim 1, wherein: the surfactant in the step 1 is one or more of glycine, alanine, p-aminobenzoic acid and hexadecyl trimethyl ammonium bromide, and the concentration of the surfactant is 0.05-2.00 g/mL.
4. The method for preparing the highly weather-resistant novel resin-coated magnetic metal powder as claimed in claim 1, wherein: the ester solvents in the steps 1 and 3 are one or two of methyl acetate, butyl acetate, ethyl propionate and ethyl butyrate.
5. The method for preparing the highly weather-resistant novel resin-coated magnetic metal powder as claimed in claim 1, wherein: the acrylic acid in the step 2 is one or more of methyl acrylate, butyl acrylate, ethyl methacrylate and n-butyl methacrylate; according to the mass percentage, the adding amount of the acrylic acid is 0.5-1.0% of the magnetic metal powder.
6. The method for preparing the highly weather-resistant novel resin-coated magnetic metal powder as claimed in claim 1, wherein: the organic cross-linking agent in the step 2 is one or more of gamma-aminopropyl triethoxysilane, gamma-methacryloxypropyl trimethoxysilane, perfluorodecyl trimethoxysilane and perfluorooctyl triethoxysilane; the addition amount of the organic cross-linking agent is 0.1-0.3% of the magnetic metal powder by mass percent.
7. The method for preparing the highly weather-resistant novel resin-coated magnetic metal powder as claimed in claim 1, wherein: the organic peroxy initiator in the step 2 is one of cumene hydroperoxide, tert-butyl hydroperoxide, dibenzoyl peroxide, lauroyl peroxide and di-tert-butyl peroxide; the addition amount of the organic peroxide initiator is 0.1-0.3% of the magnetic metal powder in percentage by mass.
8. The method for preparing the highly weather-resistant novel resin-coated magnetic metal powder as claimed in claim 1, wherein: the crosslinking reaction time in the step 2 is 0.5-2 hours, and the reaction is carried out in a stirring state.
9. The method for preparing the highly weather-resistant novel resin-coated magnetic metal powder as claimed in claim 1, wherein: and the heat treatment time in the step 4 is 8-24 hours.
CN202210215327.5A 2022-03-07 2022-03-07 Preparation method of high-weather-resistance resin-coated magnetic metal powder Active CN114678201B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210215327.5A CN114678201B (en) 2022-03-07 2022-03-07 Preparation method of high-weather-resistance resin-coated magnetic metal powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210215327.5A CN114678201B (en) 2022-03-07 2022-03-07 Preparation method of high-weather-resistance resin-coated magnetic metal powder

Publications (2)

Publication Number Publication Date
CN114678201A true CN114678201A (en) 2022-06-28
CN114678201B CN114678201B (en) 2022-11-18

Family

ID=82072219

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210215327.5A Active CN114678201B (en) 2022-03-07 2022-03-07 Preparation method of high-weather-resistance resin-coated magnetic metal powder

Country Status (1)

Country Link
CN (1) CN114678201B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117773102A (en) * 2024-02-28 2024-03-29 西北工业大学 Silicon aryne resin coated magnetic metal absorbent and preparation method and application thereof

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006173170A (en) * 2004-12-13 2006-06-29 Ricoh Co Ltd Magnetic powder for compressed molding, magnet compound for compressed molding, long-length magnet forming body, magnet roller, developing agent carrier, developing apparatus, and image forming apparatus
CN103403821A (en) * 2011-03-02 2013-11-20 日立金属株式会社 Rare-earth bond magnet manufacturing method
CN104821219A (en) * 2015-05-18 2015-08-05 朱春芳 UV-cured resin coated soft magnetic powder, preparation method and application thereof
CN107760149A (en) * 2016-08-23 2018-03-06 洛阳尖端技术研究院 A kind of antiradar coatings and preparation method thereof
CN109545537A (en) * 2018-12-28 2019-03-29 东莞铭普光磁股份有限公司 A kind of powder core and preparation method thereof
CN110541162A (en) * 2019-09-11 2019-12-06 中国人民解放军火箭军工程大学 method for coating magnetic metal film on surface of wave-absorbing material
CN110785074A (en) * 2019-11-11 2020-02-11 苏州驭奇材料科技有限公司 Composite wave-absorbing material of wave-absorbing shielding film and wave-absorbing shielding film applied by composite wave-absorbing material
CN112374547A (en) * 2020-11-13 2021-02-19 航天特种材料及工艺技术研究所 Carbonyl iron powder composite wave-absorbing material and preparation method thereof
CN112863845A (en) * 2021-01-08 2021-05-28 电子科技大学 Preparation method of crosslinked resin coated flaky carbonyl iron powder

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006173170A (en) * 2004-12-13 2006-06-29 Ricoh Co Ltd Magnetic powder for compressed molding, magnet compound for compressed molding, long-length magnet forming body, magnet roller, developing agent carrier, developing apparatus, and image forming apparatus
CN103403821A (en) * 2011-03-02 2013-11-20 日立金属株式会社 Rare-earth bond magnet manufacturing method
CN104821219A (en) * 2015-05-18 2015-08-05 朱春芳 UV-cured resin coated soft magnetic powder, preparation method and application thereof
CN107760149A (en) * 2016-08-23 2018-03-06 洛阳尖端技术研究院 A kind of antiradar coatings and preparation method thereof
CN109545537A (en) * 2018-12-28 2019-03-29 东莞铭普光磁股份有限公司 A kind of powder core and preparation method thereof
CN110541162A (en) * 2019-09-11 2019-12-06 中国人民解放军火箭军工程大学 method for coating magnetic metal film on surface of wave-absorbing material
CN110785074A (en) * 2019-11-11 2020-02-11 苏州驭奇材料科技有限公司 Composite wave-absorbing material of wave-absorbing shielding film and wave-absorbing shielding film applied by composite wave-absorbing material
CN112374547A (en) * 2020-11-13 2021-02-19 航天特种材料及工艺技术研究所 Carbonyl iron powder composite wave-absorbing material and preparation method thereof
CN112863845A (en) * 2021-01-08 2021-05-28 电子科技大学 Preparation method of crosslinked resin coated flaky carbonyl iron powder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117773102A (en) * 2024-02-28 2024-03-29 西北工业大学 Silicon aryne resin coated magnetic metal absorbent and preparation method and application thereof
CN117773102B (en) * 2024-02-28 2024-05-24 西北工业大学 Silicon aryne resin coated magnetic metal absorbent and preparation method and application thereof

Also Published As

Publication number Publication date
CN114678201B (en) 2022-11-18

Similar Documents

Publication Publication Date Title
CN108117811B (en) Graphene-silicon electromagnetic shielding filler and electromagnetic shielding coating
US7722951B2 (en) Insulator coating and method for forming same
CN103554908B (en) A kind of graphene/polyaniline/cobalt composite wave-suction material and preparation method
CN112552801A (en) Ti-containing alloy3C2TX(MXene)/polyaniline water-based anticorrosive paint and preparation method thereof
CN114678201B (en) Preparation method of high-weather-resistance resin-coated magnetic metal powder
CN108326293B (en) Method for producing silver-coated nickel powder
CN110534283A (en) Composite amorphous powder core and preparation method thereof
CN114453578A (en) Modified copper powder, modification method thereof and conductive paste
CN113353921A (en) Graphene composite material and preparation method and application thereof
Huang et al. SiO2-modified Y2Co8Fe9 multifunctional alloys with efficient microwave absorption, oxidation resistance and corrosion resistance
CN115746701A (en) RTV anti-pollution flashover coating and preparation method and application thereof
CN110835123A (en) Preparation method of cobalt metal particles and cobalt oxide composite graphite nanosheet powder
CN113388231A (en) Anti-rust carbonyl iron powder wave-absorbing material and preparation method thereof
CN113000834B (en) Wave absorbing material and method for producing same
CN113909471B (en) Coating solution of zirconium dioxide coated iron powder and treatment method
CN113077954B (en) Hard magnetic liquid metal paste composite material and preparation method thereof
CN103357866B (en) A kind of carbonyl iron dust high-temperature heat treatment method for metal magnetic powder core
CN109894611B (en) Chemical plating Cu-Fe-Co-based composite corrosion-resistant wave-absorbing material and preparation method and application thereof
CN108299861B (en) Surface-coated nano Fe3O4Modified hollow glass bead and preparation method thereof
CN114454573A (en) Ti3C2TxMXene/GO heterogeneous membrane and preparation method and application thereof
CN113150640A (en) Cerium ion-loaded two-dimensional nanomaterial-based self-healing barrier dual-function coating and preparation method and application thereof
CN113564664A (en) Preparation method of sintered NdFeB magnet surface modified carbon nanotube enhanced organic coating
CN105968887A (en) Preparation method of organic-inorganic double-cladding water-borne bronze powder
CN110746837A (en) Fluorine-containing polymer waterproof anti-fouling surface treating agent and preparation method and application thereof
Li et al. Modified Antistatic Carbonaceous Fiber with Excellent Hydrophobicity, Environmental Stability and Radar Absorption Performance

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant